Cinematographic film spool



June 15, 1937. w. SCHULZ CINEMATOGRAPHIC FILM SPOOL Filed Feb. 19, 1956- Walter Sofia? hereafter.

Patented June 15 1937 cmamA-roonarmc sroor.

Walter Schulz, Ber

assignor to Arts Ansco a curl ration 19, 1936, February 21, 1935 3 Claims. (c 242-40;

ton, N. Y., Application February I In Germany This invention relates to a cinematographic film spool. One oiqitsobjects' is to provide an improved cinematographic film spool. Further objects will 5 be seen from the detailed specification following Reference-is made to the accompanying drawing Fig. 1 shows an end view of a cinematographic fllm spool n accordance with the invention, and Fig. 2 shows a section of the fllm spool on the line 2-4 of Fig. l.

In order to prevent placed in incorrect. position on driving axles 'of cine-cameras apparatus, it has been proposed to give the opening in oneflange of a cinematographic fllm spool a shape which diflers from that in the other .flange. Thus it is known practice to provide the spool flange on one side with a round. opening and on the other side with an angul at opening, or to provide the flanges on both sld openings, the openi t as side having a dif- Ierent number of corners to that at theother side, or openings which resemble a toothed wheel." respective sides bethe number of teeth onthe The present invention solves in the simplest manner the problem 0! preventing a cinema graphic spool from incorrectlythe guide or driving projection apparatus. According tion there is fltted in the'interior of the spool shaft passage 9. tongue or similarly shaped member which moves aside when the spool is placed correctly in the apparatus but which prevents from being placed incorrectly on the axle. If, for example, as ins. a small plate-shaped spring open 40 passage of the spool onally with respect to the square openinzs. then a square shaft can be inserted in the spoolirom the rear side but not from the I spring described above can also be used vantage on s s with round flange openings; in thistcase the obliquely inserted vides a resilient support for a shalt having a flattened side which engages-the spring.

s ools according to the lnventionmar conin the attached draw- Germany, Corporation, Binghamoi New York Serial no. slats,

itain two or more obstruction members inthe interior of the spool shaft.

A form of construction is illustrated in the drawing by way of an example.

flanges'are denoted by d and the openings in the 5 spool flange by .b; tion member which, as shown in Fig. 1, obstructs a part of the flange opening: This obstruction member 0 can be fixed in an desired manner either on a spool flange-or on the hub 0. connect l0 ingthespoolflanges.

On the spools'ther may also be fitted a plus definite other side either spool desired crosssectional shape or oi another definite cross-sectional shap The obstruction member or memhere can be arranged in such a manner that only axles of quite definite cross-sectional shape can be inserted. from each side, or they may be so formed that axl desired cross-sectional form can pass through from one side only. whatlclaimisz- '1. A cinematographic film spool two flanges each provided with an the introduction of'an- 1 said flanges, and an obstruction member mounthub for preventing the introduc axle into said hub from and permitting introduction irom the openings therebypreventing the introduction oi connecting one side 0! v 

